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JPH0417499

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DESCRIPTION JPH0417499
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
speaker having an edge formed by combining a plurality of divided edge structures. Conventional
Technology Conventionally, the edge used for the speaker is used by heat forming a resin
impregnated cloth, paper 1 urethane foam, polymer resin, rubber, etc. into a roll shape or
waveform, and cutting unnecessary inner and outer peripheral portions However, large-diameter
speakers require very large press equipment for their edge molding, and the material loss is also
large, so the edge where a plurality of separately molded edge components are bonded together
with an adhesive is used. You are using Hereinafter, a speaker having an edge in which a
plurality of conventional divided edge structures are combined will be described. FIG. 4 shows a
cross-sectional view of a conventional loudspeaker. FIG. 5 shows a view of the speaker from
above. In FIG. 4, ? is a bottom plate, 2 is a magnet, 3 is a top plate, and 4 is a frame to constitute
a magnetic circuit by these components. A voice coil 5 supported by a damper 6 is disposed in a
magnetic gap of the magnetic circuit, and a diaphragm 7 having an edge 8 is coupled to an upper
end of the voice coil 5. The cap 9 is fixed. As shown in FIG. 5, the edge 8 is formed by bonding a
plurality of edge structures 10 with an adhesive and fixing it to the diaphragm 7. The operation
of the loudspeaker configured as described above will be described below. When an electric
signal is applied to the voice coil 5 in the magnetic gap, the voice coil 5 vibrates up and down
according to Fleming's left-hand rule, and the diaphragm 7 having the edge 8 vibrates.
SUMMARY OF THE INVENTION However, in the above-described conventional configuration, the
weight balance and the stiffness of the edge 8 become uneven due to the variation in the amount
of the applied adhesive because the plurality of edge components 10 are bonded together with
the adhesive. The problem is that linear vibration can not be made. In addition, when the
diameter is large, the mass of the vibration system becomes large and the edge 8 can not be
supported, and the edge shape is lost, so that the diaphragm 7 can not be supported at the
12-05-2019
1
normal position. The present invention solves the above-mentioned conventional problems, and
provides a speaker having uniform weight balance and stiffness and maintaining a normal edge
shape, thereby enabling linear vibration and normal diaphragm support. The purpose is to Means
for Solving the Problem In order to solve the problem, in the speaker of the present invention, a
plurality of edge structures divided into a plurality are combined at the peripheral edge of the
frame coupled to the magnetic circuit, and the joint is elastic. A diaphragm having an edge joined
through a sheet is attached, and a voice coil which is embedded in the magnetic gap of the
magnetic circuit is coupled to the diaphragm.
Operation With this configuration, the junction of the plurality of divided edge constructions has
a uniform stiffness and maintains a normal edge shape regardless of the amount of adhesive, so
that linear vibration and a normal position can be achieved. The diaphragm can be supported.
Embodiment An embodiment of the present invention will be described with reference to the
drawings. FIG. 1 is a cross-sectional view of a speaker according to an embodiment of the present
invention, FIG. 2 is a top view of the same, and FIG. 3 is a cross-sectional view of a junction of a
plurality of divided edge structures. In FIGS. 1 to 3, 11 is a bottom plate having a center ball lla,
12 is a ring-shaped magnet, and 13 is a ring-shaped top plate, which form a magnetic circuit. A
frame 14 is coupled to the magnetic circuit, and a cone-shaped diaphragm 17 having an edge 16
coupled to the peripheral edge of the frame 14 is attached to the peripheral edge of the frame 14
by bonding. The voice coil 18 is coupled, the middle part of the voice coil 18 is held by a damper
19, and the lower part of the voice coil 18 is fitted into the magnetic gap 20 of the magnetic
circuit without eccentricity. A dust cap 21 is attached to the upper surface of the central portion
of the diaphragm 17. The edge 16 is composed of the edge structure 22 and the sheet 23 having
elasticity, and the diaphragm 17 having the edge 16 obtained by joining the plurality of divided
edge structures 22 via the sheet 23 having elasticity is magnetic. Attached to the periphery of the
frame 14 coupled to the circuit, the diaphragm 17 is coupled to the voice coil 18 which fits into
the magnetic cap 20 of the magnetic circuit. The operation of the speaker configured as
described above is the same as that described in the conventional example. . As described above,
according to the present embodiment, by joining the plurality of divided edge structures 22
through the elastic sheet 23, the axially symmetrical joint portion has uniform stiffness and the
edge shape is normally made. It holds and enables linear vibration and support of the diaphragm
17 in the normal position. As described above, according to the present invention, the edge of the
frame connected to the magnetic circuit is combined with a plurality of edge structures divided
into a plurality, and the edge is connected to the connecting portion through the elastic sheet. By
attaching the diaphragm, it is possible to maintain the edge shape normally with uniform
stiffness at the axisymmetric joint, and realize an excellent speaker capable of near vibration of
the diaphragm and supporting to the normal position. It is possible.
[0002]
12-05-2019
2
Brief description of the drawings
[0003]
FIG. 1 is a cross-sectional view of a speaker according to an embodiment of the present invention,
FIG. 2 is a top view thereof, FIG. 3 is a cross-sectional view of a junction of a plurality of divided
edge structures, and FIG. FIG. 5 is a cross-sectional view of the speaker, and FIG. 5 is a top view
of the conventional speaker.
11 и и и и и и и и Bottom plate, 12 и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и ..... иии
Edge structure, 23 и и и и и и и и Sheet with elasticity. Name of agent Patent attorney Shigetaka Hino
Other 1 person Tom Preto
12-05-2019
3
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